M4
roller: bearing steel
hardened, dust-proof, splash-proof, lifetime lubrication
sealing discs: plastic (NBR) 2 RS
journals : steel
galvanized, blue passivated
treated steel, zinc plated, blue passivated
careers: hardened, ground
flat head screws (only in the form of UT / XT), steel, galvanized, blue passivated
scrapers: PUR plastic, gray
stiffening core: Galvanized steel
cap screws: DIN 912 Galvanized steel, blue passivated (screws are included)
( with the size h1 = 18, the scraper is fixed only with a central screw.)